312513345631 has 4 divisors (see below), whose sum is σ = 317177723992. Its totient is φ = 307848967272.

The previous prime is 312513345629. The next prime is 312513345647. The reversal of 312513345631 is 136543315213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136543315213 = 569 ⋅239970677.

It is a cyclic number.

It is not a de Polignac number, because 312513345631 - 2¹ = 312513345629 is a prime.

It is a super-2 number, since 2×312513345631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312513345691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332189080 + ... + 2332189213.

It is an arithmetic number, because the mean of its divisors is an integer number (79294430998).

Almost surely, 2^312513345631 is an apocalyptic number.

312513345631 is a deficient number, since it is larger than the sum of its proper divisors (4664378361).

312513345631 is an equidigital number, since it uses as much as digits as its factorization.

312513345631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664378360.

The product of its digits is 97200, while the sum is 37.

The spelling of 312513345631 in words is "three hundred twelve billion, five hundred thirteen million, three hundred forty-five thousand, six hundred thirty-one".